Safety seat base



FIG. 1 is a front elevation view of a safety seat base showing my design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof.

The portion shown in broken lines is for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a safety seat base, as shown and described. 